fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-24 15:20:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

aco: Don't eliminate exec write when it's used by a copy later.

Browse source 
Fixes: bc13049747
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10920>
This commit is contained in:
Timur Kristóf 2021-05-21 14:14:33 +02:00 • committed by Marge Bot
parent 5f8778a583
commit c783293e47
1 changed files with 7 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
src/amd/compiler/aco_ssa_elimination.cpp
View file

@ -294,17 +294,17 @@ void eliminate_useless_exec_writes_in_block(ssa_elimination_ctx& ctx, Block& blo
if (!ctx.logical_phi_info[block.index].empty()) {
exec_write_used = true;
} else {
bool will_insert_exec_copy = false;
bool will_inserted_exec_copy_need_exec = false;
bool copy_to_exec = false;
bool copy_from_exec = false;
for (const auto& successor_phi_info : ctx.linear_phi_info[block.index]) {
if (successor_phi_info.def.physReg() == exec)
will_insert_exec_copy = true;
if (successor_phi_info.op.physReg() == exec)
will_inserted_exec_copy_need_exec = true;
copy_to_exec |= successor_phi_info.def.physReg() == exec;
copy_from_exec |= successor_phi_info.op.physReg() == exec;
}
if (will_insert_exec_copy && !will_inserted_exec_copy_need_exec)
if (copy_from_exec)
exec_write_used = true;
else if (copy_to_exec)
exec_write_used = false;
else
/* blocks_incoming_exec_used is initialized to true, so this is correct even for loops. */